Electronic structure of the charge-density-wave compound Er ₅Ir₄Si₁₀

Photoemission and x-ray absorption measurements have been performed on Er₅Ir₄Si₁₀, a compound that exhibits an incommensurate charge-density-wave formation below 155K. The resonant photoemission and x-ray absorption measurements performed across the Er N ₅₄ and Er M₅ edge identify the Er 4f multiplet lines, the 4f occupancy and the character of the states close to the Fermi edge.